Programming FCs (Functions) and FBs for S7 Ethernet CPs

Parameter

Declara-

Type

Possible

Remarks

 

tion

 

Values

 

 

 

 

 

 

ID

INPUT

INT

1,2...16 for

The connection number of the connection is

 

 

 

S7-300

specified in the parameter ID. (see

 

 

 

1,2...64 for

Configuration Section 4.3.1)

 

 

 

 

 

 

 

S7-400

 

 

 

 

 

 

LADDR

INPUT

WORD

 

Module base address

 

 

 

 

When you configure the CP with STEP 7

 

 

 

 

hardware configuration, the module base

 

 

 

 

address is displayed in the configuration table.

 

 

 

 

Specify this address here.

 

 

 

 

 

STATUS

OUTPUT

WORD

see following

Status code

 

 

 

table

For meaning, refer to the table below.

 

 

 

 

 

Condition Codes

The following table shows the STATUS code that must be evaluated by the user program.

Table 5-5 AG_UNLOCK Condition Codes

STATUS

Meaning

7000

CP is not processing a job

 

 

7001

FETCH active

 

 

7002

WRITE active

 

 

8183

FETCH/WRITE not configured for this connection

 

 

8186

ID number not in permitted range (e.g. 1...64 with S7-400 Industrial Ethernet CPs)

 

 

172

SIMATIC NET NCM S7 for Industrial Ethernet

C79000-G8976-C129–06

Page 172
Image 172
Siemens S7 appendix 172

S7 specifications

The Siemens S7 series represents a cornerstone in the realm of programmable logic controllers (PLCs), developed by Siemens, a leading company in industrial automation. Widely used across various industries, the S7 series offers robust solutions for controlling machinery and processes, thanks to its reliable performance, flexibility, and scalable architecture.

One of the key features of Siemens S7 PLCs is the modularity of their design. Each system can be configured to meet specific application requirements due to the ability to mix various input/output modules, CPUs, and communication processors. This modular approach allows for the customization of systems to suit diverse automation tasks, providing end users with the adaptability required for modern manufacturing environments.

The S7 series encompasses several models, including the S7-1200, S7-300, and S7-1500. The S7-1200 is particularly suited for small to medium-sized applications, offering a compact design and integrated communication interfaces. In contrast, the S7-300 is designed for more extensive and complex control systems, making it ideal for large-scale industrial applications. The S7-1500 stands out with its advanced performance metrics, rich feature set, and high-speed processing capabilities, making it perfect for demanding applications that require real-time control and extensive data handling.

Siemens also emphasizes the importance of communication technologies within the S7 series. With options such as PROFINET, PROFIBUS, and EtherNet/IP, the S7 PLCs can seamlessly integrate into existing automation infrastructures, ensuring smooth data exchange between devices. The incorporation of web-based technologies and cloud connectivity further enables remote monitoring and control of systems, enhancing operational efficiency.

Another notable characteristic of Siemens S7 PLCs is the use of TIA Portal (Totally Integrated Automation Portal), an innovative software platform that simplifies the engineering process. TIA Portal allows users to program, configure, and diagnose their automation devices in a single environment, reducing setup times and improving productivity.

In conclusion, the Siemens S7 series stands out due to its modular design, range of models suitable for various applications, advanced communication technologies, and user-friendly programming software. This combination of features and characteristics makes S7 PLCs a preferred choice for industries seeking reliable and efficient automation solutions. As industrial demands continue to evolve, Siemens S7 PLCs remain at the forefront, adapting to technological advancements and setting benchmarks in the automation field.